默认题库 - 遇险通信

单选题

What is the fundamental purpose for imposing radio silence? （）

A. To ensure that interference to proprietary communications is minimized
B. To ensure that only voice communications can be effected on the distress frequency or channel
C. To ensure that a distressed vessel will have a "window" twice each hour for transmitting routine messages
D. To ensure that interference on a particular frequency or channel to communications concerning emergency traffic is minimized

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单选题

When you are firing a pyrotechnic distress signal，it should be aimed at（）.

A. straight overhead
B. at the vessel whose attention you are trying to get
C. into the wind
D. about 60 degrees above the horizo

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单选题

Which action should you take after sending a false distress alert on VHF?（）

A. Send a DSC cancellation message on Ch-70
B. Make a voice announcement to cancel the alert on Ch-16
C. Make a voice announcement to cancel the alert on Ch-13
D. Make a voice announcement to cancel the alert on Ch-22A

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单选题

Which condition represents the appropriate time for setting off distress flares and rockets? （）

At one hour intervals
B. At half hour intervals
C. Only when there is a chance of their being seen by rescue vessels
D. Immediately upon abandoning the vessel

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单选题

Which EPIRB transmits a distress alert that is received and relayed by an INMARSAT satellite?（）

A. Class A EPIRBs
B. Class B EPIRBs
C. L-Band EPIRBs
D. Category I EPIRB

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单选题

According to the “Vessel Bridge-to-Bridge Radiotelephone Act”，your radiotelephone log must contain（）.

A. a record of all routine calls
B. a record of your transmissions only
C. the home address of the vessel's Master or owner
D. a summary of all distress calls and message

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单选题

When can routine communications be resumed on a frequency or channel on which radio silence has been imposed? （）

After determining that the frequency or channel appears to be no longer in use
B. After determining that geographic distance from the distress situation will prohibit any other signal from interfering with emergency communications
C. After the Rescue Coordination Center transmits a message on the frequency or channel being used for emergency communications stating that such traffic has concluded
D. Routine communications can resume if，in the Master's opinion，communications on that frequency or channel will not interfere with emergency communicatio

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单选题

If you are transmitting a distress message by radiotelephone you should（）.

A. use English language
B. always use the International Code
C. preface it by the word "Interco"
D. follow the transmission with the radio alarm signal

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单选题

Three short blasts of the whistle means（）.

A. danger
B. I am in distress
C. the vessel is not under command (broken down)
D. I am operating astern propulsio

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单选题

What is meant by the term “radio silence”?（）

A. Stations not directly involved with the on-going distress communications may not transmit on the distress frequency or channel
B. Stations remaining off the air to safeguard proprietary information
C. Two three-minute silent periods，at 15 and 45 minutes after the hour，that provide a transmitting "window" for distressed vessels to transmit distress alerts using J3E
D. Communications on a distress frequency or channel is banned for 24 hours following the cessation of the distress traffic

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